Birdshot & Golden Triangle Present The 5th Annual Thomas Bertrand Memorial - July 16

[ERicJ]

Originally Posted by ERicJ

I do want to crunch some numbers myself but so far things don't look too far off.

The bottom line of PDGA tournament ratings is: the average of the player ratings going in will equal the average of the round ratings coming out*.

Round1: First pass just looking at 53 800+ rated players, their average player rating is 912.1. The average of the first round ratings is 912.1. So first round ratings look almost dead on. However, second pass when you drop out the players shooting more than 60 points below their rating and those without enough rounds to be propagators the numbers change to 910.6 and 918.5 respectively. That means the ratings for the first round might be ~8 points too high.**

Round2: First pass just looking at 52 800+ rated players, they averaged 914.2 player ratings, but the average of round two's ratings is only 905.9... so it looks like the second round ratings are about eight points lower than they should be. However, second pass per above yields numbers of 914.8 and 918.1. That means the ratings for the second round might actually be ~3 points too high.**

These differences are the adjustments that get made between when the TD first submits the TD report and unofficial ratings are posted vs. the official ratings that come out at the various PDGA ratings update cycles.

Originally Posted by griff

with a 46 ssa and muddy conditions wouldnt dixons 45 be better than a 995?

With the rainy conditions of the first round and sunny conditions of the second, the two rounds should sport different course configurations in the TD report. This could result in different SSA values between the first and second round, i.e. a 50 in the morning would not be rated the same as a 50 in the afternoon.

It should be noted that the playing conditions, be they rainy, muddy, windy, or all the above... have no direct effect on the SSA value. That is to say just because it rained doesn't mean the SSA will automatically be adjusted by two strokes. The SSA value falls out of the math based on how the players play in the conditions. So if the conditions are lousy and everyone plays two strokes worse than their usual game then the SSA would be two strokes higher than normal; not because of the conditions, but because of how the players played. You can have perfect conditions and if everyone plays two strokes worse than usual, the SSA will also be two strokes higher than normal for that round.

* For "propagators", which are 800+ rated players whose rating is based on at least eight rounds.

** These numbers are estimates based on what's publicly available on the PDGA website. There are non-current members who played with ratings data unavailable that might change these numbers somewhat.

[griff]

Originally Posted by ERicJ

The bottom line of PDGA tournament ratings is: the average of the player ratings going in will equal the average of the round ratings coming out*.

Round1: First pass just looking at 53 800+ rated players, their average player rating is 912.1. The average of the first round ratings is 912.1. So first round ratings look almost dead on. However, second pass when you drop out the players shooting more than 60 points below their rating and those without enough rounds to be propagators the numbers change to 910.6 and 918.5 respectively. That means the ratings for the first round might be ~8 points too high.**

Round2: First pass just looking at 52 800+ rated players, they averaged 914.2 player ratings, but the average of round two's ratings is only 905.9... so it looks like the second round ratings are about eight points lower than they should be. However, second pass per above yields numbers of 914.8 and 918.1. That means the ratings for the second round might actually be ~3 points too high.**

These differences are the adjustments that get made between when the TD first submits the TD report and unofficial ratings are posted vs. the official ratings that come out at the various PDGA ratings update cycles.



With the rainy conditions of the first round and sunny conditions of the second, the two rounds should sport different course configurations in the TD report. This could result in different SSA values between the first and second round, i.e. a 50 in the morning would not be rated the same as a 50 in the afternoon.

It should be noted that the playing conditions, be they rainy, muddy, windy, or all the above... have no direct effect on the SSA value. That is to say just because it rained doesn't mean the SSA will automatically be adjusted by two strokes. The SSA value falls out of the math based on how the players play in the conditions. So if the conditions are lousy and everyone plays two strokes worse than their usual game then the SSA would be two strokes higher than normal; not because of the conditions, but because of how the players played. You can have perfect conditions and if everyone plays two strokes worse than usual, the SSA will also be two strokes higher than normal for that round.

* For "propagators", which are 800+ rated players whose rating is based on at least eight rounds.

** These numbers are estimates based on what's publicly available on the PDGA website. There are non-current members who played with ratings data unavailable that might change these numbers somewhat.

very informative,thnx